Description: This set of magnetic detecting switch monitors the opening and closure of doors and windows used to protect doors and windows for the most part. It is great for installed on doors of house, garage, warehouse, enterprise and shop etc. Features: This is a set of magnetic detecting switch used to protect doors and windows for the most part. High quality magnetic sensor contacts with strong magnetic, sensitive respond and long durability. Integrates home security function, SOS, door bell in one body operated by remote controller for multi-functional and convenient use. When the alarm is triggered, it will give off 105dB high decibel sound to notice you. One remote controller can connect to 50 magnetic sensors while one magnetic sensor can be controlled by 8 remote controllers. The armed or disarmed status will be set by the remote controller for maximum safety. With back adhesive, it is easy to install. Please make the magnetic sensor and bar alignment with the help of marker, and it should be installed tightly. You can test whether it is OK after installation. Re mote Controller Buttons Indication: Armed Key: Press it when leaving home for armed status Disarmed Key: Press it when coming back for disarmed status SOS: Press it in emergency to call for help Call Key: Remind families to open the door or help to look after the older Specifications: Condition: 100% Brand New Material: ABS Color: White Alarm Sound Decibel: 105DB Alarm Time: Alarming 30S after the door opened(if it's still in armed status, the alarm will ring 30S though the door was closed) Magnetic Sensor Battery: 2 * AAA Batteries(not included) Remote Control Battery: 12V 17A Battery(not included) Remote Control Distance: 150m in the open area, 20m in the area with barriers Magnetic Sensor Size: Approx. 8.5*4.3*1.6cm/3.35*1.69*0.63in Weight: Approx. 72g Package Included: 1 * Magnetic Sensor 1 * Magnetic Bar 1 * Remote Controller Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. .